Deals 5 Poison Damage to enemy. Target takes an additional 0 Poison Damage over 10 seconds.
- Unlocked at Bow rank 2.
- Update 5: This ability now starts dealing bonus damage on targets under 50% health instead of 35% health.
- Update 7: Fixed an issue where Battle Spirit was applying additively rather than multiplicatively to several abilities, including this ability 
- Update 2: Increased the damage-over-time for this ability by 50%.
- Update 2: The Passive Skill, Hawk Eye, now benefits this ability.
- Update 5: Increased the damage over time for this ability by approximately 30%. We also fixed an issue where this ability couldn't critical strike.
- Update 6: Fixed an issue where the damage over time component from the ability Poison Arrow would remove you from Shadow Cloak.
- Update 7: The damage over time effect from this ability and its morphs is no longer subject to passive dodge chance.
- Update 8: Fixed an issue where several damage over time effects were not allowing multiple casters to apply their own stack. For example, previously if two player characters cast Scalding Rune at the same target, only one of those effects would apply damage over time to the target. This is now corrected for a number of abilities, including this one.